TY  - BOOK
AU  - Cunningham,William P.
AU  - Cunningham,Mary Ann
TI  - Principles of environmental science: inquiry and applications 
SN  - 0070647720 (tata McGraw-Hill):
PY  - 2008///
CY  - New Delhi
PB  - Tata McGraw-Hill
KW  - Environmental sciences
ER  -